Fly screen



Mar. 3, 1925.

R. C. WILLIAMS ET AL FLY SCREEN Filed Sept. 29, 1923 2 Sheets-Sheet l Rf #wam/W5. nn ER@ my@ l DC CH Mar. 3, 1925. 1,528,738

R. C. WILLIMS ET AL FLY SCREEN Filed Sept. 29, 1925 2 Sheets-Sheet 2 ifatented Mar. 3, 1925.

UNITED STATES PATENT OFFICE.

nion'ARn CHRISTOPHER WILLIAMS AND WALTER DE oHEaE, OF TORONTO, ONTARIO,

CANADA.

FLY SCREEN.

Application led September 29, 1923. Serial No. 665,640.

,To all whom it may concern.'

Be it known that we, RICHARD CHRISTO- riinn WILLIAMS and WALTER DE CHRE, both subjects of the King of Great Britain, and both residents of the city of Toronto, in the county of York, in the Province of Ontaria, Canada, have invented certain .new and useful Improvements in Fly Screens, of which the following is the specification.

Uur invention relates to improvements in fly screens and the Object of the invention is to devise a screen which will be carried automatically in and out of position in the window opening by the raising and lowering of the window sash and in which simple means are provided for locking the fly screen roll in any position in which it may be wound and in which detachable means are provided `for securing the free edge of the fiy screen to the window sash and it consists essentially of the arrangement and construction of parts as hereinafter more particularly explained.

Fig. 1 is a perspective view of a window and our screen showing the window sill broken away to exhibit the Hy screen roll.

Fig. 2 is a similar view to Figure 1 showing the fly screenvdetachably connected to the lower sash of a window.

Fig. 3 is a vertical section through the lower portion of Figure 1.

Fig. 4 is an enlarged perspective detail of the. ily screen roll and its housing.

Fig. 5 is a longitudinal sectional view through the housing shown in Figure 4.

Fig. G is a vertical section on the line G--G Figure 5.

Fiv'. 7 is a plan detail view of a means for detac iably connecting the end of the iy screen to the window sash, and

Fig. 8 is a longitudinal sectional View through Figure 7.

Fig. 9 indicates an alternative structure.

In the drawings like characters of reference indicate the corresponding parts in each figure.

1 indicates a window frame or casing in which is slidably supported in the usual manner a sash 2. 3 is the window sill. 4 is a cross slot formed in the frame immediately to the outside of the sill 3. The lower portion of the window frame 1 is formed hollow as indicated at 1*. 5 is a housing which is suitably supported within the portion 1x so as 'to extend crosswise of the window. The housing 5 is preferably formed in two portions 5X and 5 telescopically con- I nected together as indicated at 6. The member 5X is provided with a tongue 6 itting into edge grooves 7 formed at each edge of the member 5. By this means the members 5X and 5 may be drawn longitudinally apart to the extent desired to lit the width of the window. The housing 5 in proximity to one end is provided with a slot 8 for the purpose which will hereinafter appear.

9 is a spring roller. 10 is a pintle formed at one end of the roller 9, such pintle being journalled in an orifice 11 formed in 'one end wall of the housing 5. The roller 9 is divided into two portions 9x and 9 telescopically connected together as indicated at 12. 13 is a block secured within the member 9 in proximity to its inner end. The block 13 is provided with a central recess 13". 14 is a wall formed in the member 9 in proximity to its outer end, such wall being provided with a central orifice 14. 15 is a rod provided with a reduced inner end 15X journalled in the recessr 13X, the outer end of the rod 15 is journalled in the orifice 14 and is provided with a rectangular extension 16 projecting outward so as to extend into close proximity to the adjacent end wall of the housing 5. l

It will be noted on referring to Figure 5 that an interspace is left between one end of the roll 9 and the corresponding end of the housing 5. 17 is a locking plate which is preferably circular in form and provided with a handle 18 extending through the slot 8 of the'housing 5. The plate 17 is provided with a horizontal slot 19 through which the l `rectangular extension 16 extends, such extension fitting the slot so as to prevent rotary motion therein. 20 is a tongue which is stamped inwardly from the plate 17 and 21 is a projection carried by the end of the roller 9. 22 is a spiral spring surrounding the rod 15, such spring being secured at its inner end to the block 13 and at its outer end to the outer end of the rod 15. 23 is a strip of wire mesh forming the fly screen proper, the strip 23 being secured to the roll 9 and normally Wound thereon. By unwinding thc fly screen strip from the roll the spring 22 is drawn into tension in a similar manner as occurs when a window blind is rolled. 24 are pins carried preferably upon the window sill 3, the pins 14 being provided with annular grooves ,25 and heads 26, 27 are detachable securing devices. The devices 27 are hingcdly connected to an edge strip 28 secured along the free edge of the fly screen 23.

As will be noted on referring to Figure the devices 27 each comprise a plate 28X having an orifice 29 extending from one face thereof and a recess 30 formed in the other face around the orifice 29. 31 is a plate covering the recess 30, such plate being provided with an orifice 32 Ain alignment with the orifice 29.

33 and 34 are spring fingers. the ends 36 thereof being connected together and to the plate 30, the opposite ends of the fingers being free. Intermediately of their length the fingers 34 and 35 are provided with opposing concaved portions 39 and 40 located in a concentrlc position to the orifices 29 and 32. 41 arepins secured to the window sash 2in alignment with .the pins 24 and similarly constructed to the pins 24.

When it is desired touse the fly screen the lower edge of the window sash 2 is carried into an adjacent position to the free edge of the ily screen, the devices 27 being then thrown upward into position so that the heads of the pins l41 extend through the orifices 29 and 32, and the concaved portions of the fingers 33 and 34 engage the annular groove correspondino` to the annular groove 25 of the pin 24. t:By this means the fly screen is connected to the sash 2 and by raising the sash 2 the screen is drawn upward from the spring roller 9, thereby covering the opening formed by the raising of the window. When it is desired to detach the fly screen fromv the window sash all that is necessary to do is to swing the devices 27 on their hinge pins out of engagement with the pins 41, the lingers 34 and 35 springing apart as the pull is exerted, thereby freeing the ily screen from the window sash. The fly screen is then lowered and as it is lowered to its final position the devices 27 are swung outward so as to engage the pins 24 in a similar manner to that described in connection with the pins 41.

In order to lock the spring roll from being turned and thereby prevent'the raising of the window from the outside, we force the handle 18 inward so as to carry the projection 20 into the path of the projection 21. It will thus be seen that as the roll 9 is turned these projections will come into engagement, there y 'preventing the further turning movement of the roll and also thereby preventing the raising of the window sash further. Also when the housing 5 is removed from the window casing as may be done at the end of the season, the plate 17 is moved into the locking position so as to hold the spring 15 in tension, preventing the fly screen running slack. If desired, the housing 5 and the ily screen contained there in may be secured on the outside ot the window sill across the bottom of the window and the pins 34 carried thereby. By this means our fly screen may be adapted to an old window instead of being built into the structure when the window frame is made as illustrated in Fig.9. j

In order to prevent, the flies from crceping around the vertical edges of the fly screen we have provided metal strips 42 carried by the windowframe so as to bear upon the face of the fly screen adjacent to cach edge thereof, as is clearly indicated in Figure 2, thus sealing the edge.

From this description it Will be seen that we have devised a very simple form of fly screen which is automatically carried in and out of its operative position by the raising and lowering of the window sash and in which simple means are provided for locking the fly screen in the stationary position either when completely rolled in the housing 5 or partially unwound therefrom, and also simple means for detachably connecting' the free edge of the fly screen tothe window sash.

What we claim as our invention is:

1. In a fly screen, the combination with a spring roller having a attened pintle at one end, a housing for the roller provided with a peripheral slot, a plate fitting against the end of the roller and having a longitudinal slot through which the flattened pintle extends, a handle extending outwardly from the plate through the slot of the housing, a projection extending inwardly from the diametrically opposite side of the plate to the handle and a projection extending from the roller adapted to engage the projection of the plate when the projection of the plate is moved into circumferential alignment therewith.

2. In a fly screen, the combination with a spring roller mounted in suitable bearings` a fly screen strip wound upon the roller and window sash attaching means comprising headed projections extending from the sash of the window, and headed projections extending vfrom the sill, arms hinged to the free end of the fly screen .provided with orices extending therethrough and into which the heads of the sash are adapted to extend when the member is swung in one direction and into which the heads of the orifices of the sill are adapted .to extend when the member is swung in the opposite direction, spring finger means carried by the hinge member adjacent the orifice and adapted to engage beneath the head of either the sash or the sill when either the head of the projection of the sash or the head of the projection of the sill is in entering position within the orifice.

RICHARD CHRISTOPHER WILLIAMS. WALTER DE ca-:Ra

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